Good ACT score and bad subject test scores

I got a 30 on my ACT and im planning to retake them, but I have bad subject test scores. Do schools really care about them? and could they be the thing that does not allow me to get accepted into a college?

Did you study for your subject test? My son refuses to study for any of these tests. He got a 29 on his ACT (he took it twice, so 30 for those schools that superscore) and a 2130 on his SAT. Only 630 on Math II and 590 on Literature, though. He's taking it again Saturday, but he says he doesn't believe in studying for it. I think if you study, it will definitely help.